Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 a7bb017b151787a7…

MALICIOUS

Office (OLE)

99.5 KB First seen: 2015-09-16
MD5: 20f8f4d3834f7f873c4f7d9336e4f23f SHA-1: 7d4585ecd7bebdc1c18752a91377aaa91c03311f SHA-256: a7bb017b151787a70f04ce743df3f91367291021df716a6339e513a3db05f46e
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1203 Exploitation for Client Execution

The sample is an OLE file containing Excel 4.0 macros, indicated by the OLE_XLM_AUTOOPEN and OLE_XLS_FORMULA_MACRO_VIRUS heuristic firings. The presence of 'XL4Poppy' in the document body suggests a specific macro name associated with older Excel macro malware. The macros are likely designed to download and execute a secondary payload, a common technique for initial execution and further compromise.

Heuristics 2

  • Legacy Excel formula macro virus marker critical OLE_XLS_FORMULA_MACRO_VIRUS
    Workbook stream contains self-identifying legacy Excel formula macro virus markers. This indicates the document carries formula macro virus content even when no VBA project or modern XLM macro-sheet structure is present.
  • Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN
    Workbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.

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